Add explicit detectors and optional auth

tests/test_vision.py

@@ -1,6 +1,6 @@
 import numpy as np
 
-from app.vision import BBox, crop_image, detect_salient_object, select_primary_bbox, square_bbox
+from app.vision import BBox, crop_image, detect_animal, detect_subject, select_primary_bbox, square_bbox
 
 
 def test_square_bbox_is_square_and_inside_bounds():
@@ -21,17 +21,25 @@ def test_crop_image_uses_bbox():
     assert crop.shape[:2] == (20, 30)
 
 
-def test_detect_salient_object_finds_rectangle():
+def test_detect_subject_finds_rectangle():
     image = np.zeros((100, 100, 3), dtype=np.uint8)
     image[25:75, 30:80] = 255
-    bbox = detect_salient_object(image)
+    bbox = detect_subject(image)
     assert bbox is not None
     assert bbox.w >= 45
     assert bbox.h >= 45
 
 
-def test_select_primary_bbox_falls_back_when_detector_disabled():
+def test_detect_animal_uses_contour_fallback():
+    image = np.zeros((100, 100, 3), dtype=np.uint8)
+    image[20:70, 15:85] = 255
+    bbox = detect_animal(image)
+    assert bbox is not None
+    assert bbox.w >= 50
+
+
+def test_select_primary_bbox_defaults_to_subject():
     image = np.zeros((100, 120, 3), dtype=np.uint8)
-    bbox, method = select_primary_bbox(image, detector="center")
+    bbox, method = select_primary_bbox(image)
     assert method == "center_fallback"
     assert bbox.w == bbox.h